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DB Saturday Puzzle - July 1, 2006

 
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keith



Joined: 19 Sep 2005
Posts: 3178
Location: near Detroit, Michigan, USA

PostPosted: Sat Jul 01, 2006 11:30 am    Post subject: DB Saturday Puzzle - July 1, 2006 Reply with quote

Code:
Puzzle: DB070106  ******
+-------+-------+-------+
| 8 . . | 9 . . | . 5 . |
| 6 . . | 8 7 . | . 9 . |
| . 2 . | 4 . . | . 7 8 |
+-------+-------+-------+
| . . . | . . . | 1 . . |
| 4 1 . | 6 . 3 | . 8 2 |
| . . 8 | . . . | . . . |
+-------+-------+-------+
| 7 6 . | . . 9 | . 4 . |
| . 8 . | . 6 4 | . . 7 |
| . 3 . | . . 7 | . . 5 |
+-------+-------+-------+


Seems to need a chain ...

Keith
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ravel



Joined: 21 Apr 2006
Posts: 536

PostPosted: Sat Jul 01, 2006 12:42 pm    Post subject: Reply with quote

Code:
 *-----------------------------------------------------------*
 | 8     47    17    | 9     3     12    | 24    5     6     |
 | 6     45    3     | 8     7     25    | 24    9     1     |
 | 15    2     9     | 4     15    6     | 3     7     8     |
 |-------------------+-------------------+-------------------|
 | 2     579   6     | 57    45    8     | 1     3     49    |
 | 4     1     57    | 6     9     3     | 57    8     2     |
 | 3     579   8     | 1257  1245  15    | 57    6     49    |
 |-------------------+-------------------+-------------------|
 | 7     6     12    | 125   125   9     | 8     4     3     |
 | 15    8     125   | 3     6     4     | 9     12    7     |
 | 9     3     4     | 12    8     7     | 6     12    5     |
 *-----------------------------------------------------------*

There is a nice uniqueness elimination, which does not help much:
r4c4=5 => r4c2=7 => r5c3=5 => deadly pattern 12 in cells r78c3, r79c4, r89c8.

Coloring in 5 (4 strong links) solves it.
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